safelight

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safelight

[′sāf‚līt]
(graphic arts)
A darkroom light of a particular color that will not affect the sensitive material being handled; for example, blue-sensitive materials require a red, orange, or yellow safelight.
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Unexposed and unprocessed film must be handled under dark green safelights. The film's silver and polyester are recoverable.
Another Try At Dry
Maybe the darkroom, with its safelights and storage, should be separate from the processing?
Continuous quality improvement
The video recording equipment and safelights were connected to a power supply with battery back-up.
A circadian rhythm of swimming behavior in a predatory leech of the family Erpobdellidae

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